>> tracie potts there for us in washington. thank you. >>> an american hiker, sarah shourd is free this morning after spending more than a year in an iranian prison. but the story is not over. two other american hikers still being held on espionage charges. andrea mitchell filed this report from tehran late last night. >> reporter: it was a happy ending tonight for sarah shourd, the 32-year-old american hiker, released from an iranian prison and flown immediately to oman, who put up the $500,000 that iran was demanding for her bail >> on behalf of myself and my family, if anything, i'm standing here today because of the efforts of many people and many governments. >> reporter: she was reunited there with her mother, nora, who with the other two mothers had been lobbying and begging for the release of their children, saying that they had simply wandered across the border, an unmarked border in iran from iraq and that they were certainly not spies. but the prosecutor has announced that not only are there charges of espionage agai